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Resin molded products and lamp parts for vehicles

A technology of resin molding and melting resin, which is applied in the field of lamp parts for vehicles, can solve the problems of reduced formability, and achieve the effects of improving formability, simplifying the structure, and preventing damage

Active Publication Date: 2016-03-16
KOITO MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, in the state where the mold is not opened, the molded vehicle lamp part does not deform due to the force generated at the bending part. However, if the first mold (core mold) and the second mold (cavity mold) are opened When shrinkage occurs, the bending portion will be deformed in the direction of increasing the radius of curvature due to shrinkage. When the mold is opened, the second mold will rub against the vehicle lamp parts, which may damage the vehicle lamp parts and reduce the formability.

Method used

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  • Resin molded products and lamp parts for vehicles
  • Resin molded products and lamp parts for vehicles
  • Resin molded products and lamp parts for vehicles

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Embodiment Construction

[0070] Hereinafter, embodiments for implementing the present invention will be described with reference to the accompanying drawings. In the following embodiments, although various limitations are made to constituent elements, types, combinations, shapes, relative arrangements, etc., these are merely examples, and the present invention It is not limited to this.

[0071] [Structure of resin molded products (lamp parts for vehicles)]

[0072] First, the structure of the resin molded product 1 molded as a lamp part for vehicles will be described (see Figure 1 to Figure 3 ).

[0073] The resin molded product 1 is formed by injection molding, for example, from crystalline resin materials such as polybutylene terephthalate (PBT), polyethylene terephthalate (PET), polyaldehyde (POM), or their synthetic resin materials. take shape. The resin molded product 1 is, for example, a vehicle lamp component used as a component of a vehicle lamp, and is molded as an extension for shieldin...

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PUM

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Abstract

The invention relates to a resin forming product and a lamp part for vehicles. The purpose is to raise the forming property. Molten resin loaded into a chamber of a die (100) comprising a first die (101) and a second die (102) is subjected to cooling and forming. Bending sections (5, 5) bending towards the setting direction are provided. Fitting sections (6) are arranged. When the molten resin is cooled, the molten resin is fit with at least one of the first die or the second die and extrudes from the bending sections. The fitting sections incline relatively towards the curvature radius largening direction caused by shrinkage of the bending sections during cooling.

Description

technical field [0001] The present invention relates to the technical field of a molded resin molded product having a bent portion bent in a predetermined direction and a vehicle lamp component. Background technique [0002] [Patent Document 1] Japanese Patent Laid-Open No. 2009-102581 [0003] Vehicle lamp components used as components of vehicle lamps include various components such as lamp housings for arranging light sources, reflectors for reflecting light emitted from light sources, internal structures for shielding, and extensions for improving appearance. [0004] Such a vehicle lamp component is formed as a resin molded product by cooling molten resin filled in a cavity of a mold including a first mold and a second mold (for example, refer to Patent Document 1). [0005] Patent Document 1 discloses a technology in which automotive lighting components such as reflectors and extensions are molded from a resin material such as polybutylene terephthalate (PBT). [000...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F21S2/00F21V15/02F21V7/00F21V3/00
Inventor 木幡隆宏池田利正松永贵久杉山雅纪
Owner KOITO MFG CO LTD